Answer: cross-sequentional design
Explanation:
A cross-sequential design is a combination of a longitudinal (analizes the same variable for example a group of people, over a period of time) and a cross-sectional design (analizes data at a specific point of time).
Cross-sequational method in the example given is comparing different groups of people at different times.
Probably because of its big surface area, and diverse people
A landform that is wide at the bottom and rises more than 2,000 feet(610 m) level to a narrow peak is called a volcano.
Francisco Pizarro was in search of gold when he found the inca.
